INFORMATION:

RAF Barford St John, Oxfordshire is located south of Banbury, Oxfordshire. Take the A36 to Bloxham and then follow the signs to Barford St John, and the airfield is on your left. Next on the right is the operations block.
OS Ref: SP432344
You can use the Ordnance Survey 'Get a Map' and follow the instructions. Copy and paste the map reference.